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bu508a


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                                                       BU208A/508A/508AFI
                                               HIGH VOLTAGE FAST-SWITCHING
                                                     NPN POWER TRANSISTOR
s   SGS-THOMSON PREFERRED SALESTYPES
s   HIGH VOLTAGE CAPABILITY
s   U.L. RECOGNISED ISOWATT218 PACKAGE
    (U.L. FILE # E81734 (N)
s   JEDEC TO-3 METAL CASE.                                                                  TO-3

APPLICATIONS:                                                       1
s HORIZONTAL DEFLECTION FOR COLOUR                                          2
  TV

DESCRIPTION
The BU208A, BU508A and BU508AFI are
manufactured     using    Multiepitaxial  Mesa                                                                 3
                                                                             3
technology for cost-effective high performance                          2                               2
and uses a Hollow Emitter structure to enhance        TO-218       1             ISOWATT218        1
switching speeds.


                                                        INTERNAL SCHEMATIC DIAGRAM




ABSOLUTE MAXIMUM RATINGS
    Symbol                        Parameter                             Value                          Unit
     V CES    Collector-Emitter Voltage (V BE = 0)                      1500                            V
     V CEO    Collector-Emitter Voltage (I B = 0)                        700                            V
     V EBO    Emitter-Base Voltage (I C = 0)                                10                          V
      IC      Collector Current                                             8                           A
     I CM     Collector Peak Current (tp < 5 ms)                            15                          A
                                                        TO - 3    T O - 218       ISOW ATT 218
                                           o
     P t ot   Total Dissipation at T c = 25 C             150          125            50                W
                                                                                                       o
     T stg    St orage Temperature                     -65 to 150 -65 to 150       -65 to 150              C
                                                                                                       o
      Tj      Max. Operating Junction Temperature         150          150            150                  C


June 1996                                                                                                      1/8
BU208A/508A/508AFI

THERMAL DATA
                                                                                 T O-3        TO-218   ISO WATT218
                                                                                                                           o
  R t hj-ca se   Thermal Resistance Junction-case                          Max        1         1              2.5             C/W


ELECTRICAL CHARACTERISTICS (Tcase = 25 oC unless otherwise specified)
  Symb ol              Parameter                            Test Cond ition s                  Min.    Typ .     Max.      Un it
                                                                                          o
      I CES      Collector Cut-off            V CE = 1500 V                T C = 125 C                                1    mA
                 Current (V BE = 0)           V CE = 1500 V                                                           2    mA
      I EBO      Emitter Cut-off Current      V EB = 5 V                                                             100       



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